When I was doing I, I used to buy vaseline from a local pharmacy - it
conveniently came in a squeezable tube that could be adapted with a nozzle
cap (from a glue bottle). Alternatively a thickened mineral oil concoction
was applied by means of a pipe cleaner that was twisted in a circle with a
hand
Thanks to everyone who replied!
This is a summary in case anyone is wondering about the same:
1. A clear majority of replies was along the lines of "just buy pre-greased
plates".
2. Next in popularity was self-greasing with Dow Corning high vacuum grease.
3. Several replies suggested mixing
